Control mechanism for steam heating systems



April 1933. H. SCHIERLOH 1,905,005

CONTROL MECHANISM FOR STEAM HEATING SYSTEMS Filed Dec. 6, 1930 INVENTOR.

Hem cam/22w A TTORNEY.

Patented Apr. 25, 1933 UNITED STATES HENRY SGHIERLOH, OF KANSAS CITY,MISSOURI CONTROL MECHANISM FOR STEAM HEATIN G SYSTEMS Application filedDecember 6,1930. Serial mi. o0,5 47.

This invention relates to automatic control for boilers or the like, andparticularly to means for automatically regulating the fire in afurnace.

5 An object of the invention is to provide a control member which may befitted to a standard furnace to automatically regulate feed of fuel tothe fire.

A further object of the invention is to have the device adjustable tofit various sizes and types of furnaces.

These and other objects are accomphshed by means of the followingconstruction, 1n which:

Fig. 1 is a perspective View illustrating a preferred form of theinvention.

Fig. 2 is a detail plan view showmg the lower attaching member.

Referring to the drawing, 5 is a steam boller on a furnace having a pipe6 leading from the interior thereof to a diaphragm chamber 7. Thechamber 7 contains a diaphragm adapted to receive steam pressure fromthe boiler on one face and has attached to and projecting from theopposite face a shaft 9 which carries at its upper end a rod 10, whichis pivotally connected to the shaft 9 and to a support 11 on thediaphragm chamber 7. The rod 10 is provided with a weight 13 topartially balance steam pressure.

Attached to the top of the furnace is a frame which may be generallydesignated at 15, and comprises a horizontal angle iron 17 and avertical angle iron 18. The lower angle 17 is connected to the furnaceby means of a U-bolt 19 encircling the pipe 6 and which is adjustable inthe slots 20. The vertical angle 18 carries a U-shaped frame member 22adjustably mounted on the said angle 18 by means of the bolts 23 and theslot 24.

At the upper end of the U-member 22 there is rockingly connected a leverassembly or an operating frame designated 26. The frame 26 comprises arod or bar 27 having one end thereof bent downwardly at right angles tothe rod 27, as shown at 29. The re 10 passes through the lower portionof the U-shaped member 22 and between adjustable pegs 30 mounted in theslot 32 of the bent down portion 29. A weight 34 is adjustably mountedon the rod 27 to act as a counterbalance for the weight of the bent downportion 29. a 1

Rigidly attached to the frame 26 and proj ecting upwardly at rightangles thereto from the pivotal point is an actuating arm 36 which mayhave arubber covered weight 37 at the upper end. The weight 37 isadapted to travel between the stop '39 and the stop 40 on the adjustablearm 41. The stops 39 and 40 are adjustably mounted on the arm 41 bymeans of slots or equivalent means. The said arm 41 is adjustablymounted on the vertical angle 18 by means of nuts 42 and slot 43. Anelectric switch 45 is attached to the angle 18 through an arm 46. Theswitch may be of the knife type as shown, or any other suitable typedesired. 7

A link 48 of insulating material is made adjustable in length and isconnected to the arm 36. The link 48 contains aslot 49 adapted toreceive the pin '50 which is attached to the switch throwing arm 52.

The control switch 45 controls an electrically operated valve 47 forcontrolling the flow of gas or other fuel into the furnace.

In operation the weight 13 is adjusted on the rod 10 so that at agivenpressure the rod 10 will rise, pressing against the upper pin 30 andmoving the frame 26 about its pivotal point and throwing the actuatingarm 36 over towards the pin 40. a The pin 50will slide in the slot 49until the weight 37 passes the angle 18, at which time the end of theslot 49 engages the pin 50 and the weight 37 becomes active to exertforce in the rod 48 and disconnect the switch, shutting off the supplyof fuel to the furnace.

When the steam pressure again goes below the required amount, the rod 10will lower, contacting with the lower pin 30, and pivot the frame in theopposite direction, throwing the arm 36 again towards the pin 39.

When the weight 37 has passed the angle 18, the pin 50 comes in contactwith the opposite end of the slot and the said weight 37 acts to closethe switch and again turn on the supply of fuel.

What is claimed as new and desired to seme cure by Letters Patent is:

1. In combination with a pressure-actuated diaphragm surrounded by acasing, and an electro-magnetically-actuated valve controlling flow ofpressure to said casing, a rod pivotally connected to the diaphragm andto said casing, a frame, means for mounting the frame in adjustablerelation to said casing, spaced stop members carried by the frame, alever assembly pivotally mounted on the frame including a bar havingspaced stop means adjacent one of its ends for engaging opposite edgesof said rod, and having a weight adjustably mounted on its opposite end,an arm fixed to the bar intermediate its ends and engageable with thestop members on the frame, a switch for controlling the valve, and meansfor operably connecting said switch to the arm.

2. In combination with a pressure-actuated diaphragm surrounded by acasing, and an electro-magnetically-actuated valve controlling fiow ofpressure to said casing, a rod pivotally connected to the diaphragm andto said casing, a frame adjacent the casing, adjustably spaced stopmembers carried by the frame, a lever assembly pivotally mounted on theframe including a bar having adjustably spaced stop means adjacent oneof its ends for engaging opposite sides of said rod and having a weightadjustably mounted on its opposite end, a lateral arm fixed to the barintermediate its ends and engageable with the stop members on the frame,a switch for controlling the valve, and means for operably connectingthe switch to said arm.

3. In combination with a pressure-actuated diaphragm surrounded by acasing, a rod pivotally connected adjacent one of its ends to thediaphragm and to said casing. a weight adjustably mounted on the rodadjacent its opposite end, a frame, means for mounting the frame inadjustable relation to said casing, spaced stop members carried by theframe, a lever assembly pivotally mounted on the frame including a barhaving a lateral end provided with adjustably spaced stop means forengaging opposite sides of said rod, a weight adjustably mounted on theopposite end of the bar, a lateral arm fixed to the bar intermediate itsends and provided with a weight engageable with the stop members on theframe, a switch carried by the frame, and means for operably connectingthe switch to said arm.

In testimony whereof I aflix my signature.

HENRY SCHIER-LOH.

